Stress concentration factors are defined for the fiber and matrix in an axially loaded unidirectional composite which has a discontinuous fiber Effects of variations in fiber volume fraction, end-gap size, and modulus ratio are studied by using a linearly elastic finite-element analysis Results show that the fiber stress concentration factors reach a maximum value of 1.5 and then remain relatively unchanged The matrix stress concentration factors, however, are shown to increase rapidly with decreasing end-gap size and increasing modulus ratio.
Get full access to this article
View all access options for this article.
References
1.
T.F. MacLaughlin , "Effect of Fiber Geometry on Stress in Fiber Reinforced Composite Materials," Experimental Mechanics, October (1966).
2.
M.J. Iremonger and W.G. Wood, "Stresses in a Composite Material with a Single Broken Fibre," Journal of Strain Analysis, Vol. 2, No. 3 ( 1967), p. 239.
3.
A.S. Carrara and F.J. McGarry, "Matrix and Interface Stresses in a Discontinuous Fiber Composite Model," Journal of Composite Materials, Vol. 2, No. 2, April (1968), p. 222.
4.
E. Sternberg and R. Muki, "Load-Absorption by a Filament in a Fiber-Reinforced Material," Technical Report No. 20, Division of Engineering and Applied Science, California Institute of Technology, AD 698299, October ( 1969).
5.
T.F. MacLaughlin , "A Photoelastic Analysis of Fiber Discontinuities in Composite Materials," Journal of Composite Materials, Vol. 2, No. 1, January (1968), p. 44.
6.
P.E. Chen and R.E. Lavengood, "Stress Fields Around Multiple Inclusions," Monsanto/ Washington University, ONR/ARPA Association, HPC 68-60, AD 846907, January (1969).
7.
M.J. Iremonger and W.G. Wood, "Effects of Geometry on Stresses in Discontinuous Composite Materials," Journal of Strain Analysis , Vol. 4, No. 2 ( 1969), p. 121
8.
T.F. MacLaughlin and R.M. Barker, "Effect of Modulus Ratio on Stress Near a Discontinuous Fiber," Paper No. 1826A, Society for Experimental Stress Analysis Spring Meeting, Salt Lake City, Utah, May 18-21 (1971).
9.
J.S. Przemieniecki, Theory of Matrix Structural Analysis, McGraw-Hill , N Y (1968).
10.
M.J. Iremonger and W.G. Wood, "Plastic Flow and Failure of Discontinuous-Fibre Composite Materials," Journal of Strain Analysis, Vol. 5, No. 3 ( 1970).
